I can't talk specifically about "biologic clover" because I've never used it - hopefully its a perennial clover - I'm sure it says on the bag.

In general - plant it a little heavier than usual - maye 25% more than it says to - because since its old - its likely that some portion will not germinate.

Yes - Go to the "farm store" or Co-op near you and get a bag of Inoculant - it cost like $3.00. Get the one for White Clover.

Broadcast it just before a rain and roll it in - even if you have to use your truck tires - Pressing it into the soil is 5 times better than covering it - and its important that the soil is "compacted" for good germination.

Good luck - We still have A LONG WAYS till spring here.